CVE-2026-45747: CWE-476: NULL Pointer Dereference in OISF suricata
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.16, the Lua TLS certificate information helper could dereference NULL certificate fields when a Lua script requested certificate information for TLS traffic where some certificate fields were absent. Crafted TLS traffic processed by a deployment using affected Lua TLS scripting could crash Suricata, resulting in denial of service. Version 7.0.16 contains a fix. As a workaround, avoid Lua scripts that call TLS certificate information helpers on untrusted traffic (`TlsGetCertInfo` function), or update scripts to handle missing certificate fields where possible.
AI Analysis
Technical Summary
Suricata versions before 7.0.16 contain a NULL pointer dereference vulnerability (CWE-476) in the Lua TLS certificate information helper. Specifically, when a Lua script requests TLS certificate information for traffic where some certificate fields are absent, the helper may dereference NULL pointers. This can cause Suricata to crash, resulting in a denial of service condition. The vulnerability is addressed in Suricata 7.0.16. As a workaround, users should avoid using Lua scripts that call the TLS certificate information helper (`TlsGetCertInfo`) on untrusted TLS traffic or modify scripts to safely handle missing certificate fields.
Potential Impact
Exploitation of this vulnerability can cause Suricata to crash, leading to a denial of service. There is no impact on confidentiality or integrity as per the CVSS vector. The attack requires network access with no privileges or user interaction needed.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or later, which contains a fix for this vulnerability. Alternatively, avoid using Lua scripts that call the TLS certificate information helper on untrusted TLS traffic or update such scripts to handle missing certificate fields safely.
CVE-2026-45747: CWE-476: NULL Pointer Dereference in OISF suricata
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.16, the Lua TLS certificate information helper could dereference NULL certificate fields when a Lua script requested certificate information for TLS traffic where some certificate fields were absent. Crafted TLS traffic processed by a deployment using affected Lua TLS scripting could crash Suricata, resulting in denial of service. Version 7.0.16 contains a fix. As a workaround, avoid Lua scripts that call TLS certificate information helpers on untrusted traffic (`TlsGetCertInfo` function), or update scripts to handle missing certificate fields where possible.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata versions before 7.0.16 contain a NULL pointer dereference vulnerability (CWE-476) in the Lua TLS certificate information helper. Specifically, when a Lua script requests TLS certificate information for traffic where some certificate fields are absent, the helper may dereference NULL pointers. This can cause Suricata to crash, resulting in a denial of service condition. The vulnerability is addressed in Suricata 7.0.16. As a workaround, users should avoid using Lua scripts that call the TLS certificate information helper (`TlsGetCertInfo`) on untrusted TLS traffic or modify scripts to safely handle missing certificate fields.
Potential Impact
Exploitation of this vulnerability can cause Suricata to crash, leading to a denial of service. There is no impact on confidentiality or integrity as per the CVSS vector. The attack requires network access with no privileges or user interaction needed.
Mitigation Recommendations
Upgrade Suricata to version 7.0.16 or later, which contains a fix for this vulnerability. Alternatively, avoid using Lua scripts that call the TLS certificate information helper on untrusted TLS traffic or update such scripts to handle missing certificate fields safely.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-13T06:54:34.220Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa2bd3eacd9273b49369fb0
Added to database: 09/10/2026, 14:22:54 UTC
Last enriched: 09/10/2026, 14:37:11 UTC
Last updated: 09/10/2026, 16:52:27 UTC
Views: 6
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